P1397high severityPowertrain
Camshaft Position Sensor B Circuit Bank 2
on 1996 BMW M3 3.2L I6 S52 · RWD
What this code means
The DME detected a malfunction in the exhaust camshaft position sensor (Sensor B) circuit on Bank 2. Without a valid signal, the DME cannot accurately control VANOS timing or ignition on Bank 2.
Symptoms
- Check Engine Light
- Rough running
- Loss of power
- VANOS fault
- Engine may stall
Common causes
- Faulty camshaft position sensor Bank 2 exhaust
- Wiring damage to sensor
- Corroded connector
- Tone wheel contamination
- Sensor air gap incorrect
Diagnostic steps
- Test sensor signal output
- Inspect wiring and connector
- Check sensor mounting and air gap
- Inspect tone wheel condition
- Test with known-good sensor
Repair notes
Replace the exhaust camshaft position sensor on Bank 2.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1